Telephone



(No Model.)

S. A. DINSMORE. TELEPHONE.

No. 553,452. Patented J55. 21, 1896.

UNITED STATES PATENT OFFICE.

SAMUEL ARTIIUR DINSMORE, OF CHICAGO, ILLINOIS.

TELEPHONE.

SPECIFICATION forming part of Letters Patent No. 553,452, dated January 21, 1896.

Application filed April 22, 1895. Serial No. 546,643. (No model.)

To all whom it may concern:

Be it known that I, SAMU L ARTHUR DINS- MORE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain Improvements in Telephones, of which the following is a specification.

Myinventlon relates to telephones,and particularly to telephones having granulatedcarbon transmitters.

The object of my invention is to provide an improved automatic means for manipulating the transmitter, so as to prevent its efficiency from being impaired by the packing of the carbon or from other conditions of the carbon resulting from the use of such transmitter.

My invention is illustrated in the accompanying drawings, wherein Figure l is a front elevation of a transmitter and magneto-generator with parts broken away. Fig. 2 is a side elevation of the same with parts broken away.

Like letters refer to like parts throughout both figures.

I have shown in the drawings an ordinary magneto signaling device having the granulated-carbon transmitter A connected therewith, as shown. The magneto-generator is constructed in the ordinary manner, the armature-shaft B being provided with the pinion B, which engages the gear-wheel B on the short shaft 13", to which is fastened the operating-handle B The receiver A is j ournaled in or attached to the front portion A of the magneto-box, so that it is free to rotate. An annular projecting rib A surrounding the transmitter and connected therewith, is preferably provided with teeth or projections A A pinion C is rotatably mounted upon the short shaft 0 and meshes with the gear-wheel B A disk or wheel 0 preferably of elastic material-for example, rubberis also mounted upon the shaft 0 and is rigidly connected to the pinion C. Said disk engages the projections upon the annular rib A I have not shown or described the mechanism of the magneto-generator or the transmitter in detail, as they are no part of my invention. It is evidentthat the construction and arrangement of these several parts may be varied, and I do not therefore wish to be limited to the construction shown.

The use and operation of my invention are as follows: lVhen it is desired to use the telephone a signal is given by turning the handle 13 of the magneto-generator. Since in my device the pinion C meshes with the gearwheel B and the wheel or disk C is in contact with the annular rib A the turning of the handle 13 will also cause the transmitter to be rotated. This rotation of the transmitter shakes or stirs up the granulated carbon, so that it assumes a loose condition at the time the transmitter is being used, and hence the efficiency of the transmitter is kept practically the same at all times and is not impaired by use.

It will be seen that I have here a simple, efficient and reliable means for shaking up the granulated carbon each time the telephone is used, and that the only additional mechanism necessary to bring about this result is the pinion 0, disk C and annular rib A I claim- 1. The combination in a telephone of a movable transmitter, a signaling device, a disk or wheel associated with said transmitter so that the motion of said disk or wheel moves the transmitter and an operative connection between said disk or wheel and the operating handle of the signaling device.

2. The combination in a telephone of a movable granulated carbon transmitter, a signaling device, an elastic disk or wheel associated with said transmitter so that its motion is communicated thereto, and an operative c011- nection between said disk or wheel and the operating handle of the signaling device whereby said transmitter is moved so as to shake up the carbon each time. the telephone is used.

3. The combination in a telephone of a sig naling device, a rotatable transmitter provided with an annular projecting rib, a wheel or disk of elastic material in contact with said rib, a pinion rigidly connected with said wheel or disk, and a gear wheel meshing with said pinion and rigidly connected with the operating handle of said signaling device, whereby the transmitter is rotated each time the signal is operated substantially as described.

SAMUEL ARTHUR DINSHORE.

\Vitnesses:

FRANCIS M. IRELAND, LILLEY W. JoHNsToNE. 

